I LOVE LOVE LOVE my tempurpedic mattress (and pillows). We've had the bed for about 9 years. We got the dual twin xl adjustable model so they fit side by side in our king bed frame. I can't say enough about them. I sleep great and I was a constant turner. We can't feel when the other person is moving around in bed. No craters have formed where our bodies lay night after night. No need to flip or turn the mattresses. They are great! Most of the time you can get a 90 day free trial.
The ONLY bad thing I can say about them is that if your room is hot, the bed is going to be hot. Good luck with your choice!